Building riser cable
CA 2020898 C · Owner: Hardin, Tommy Glenn · Inventors: Khorramian, Behrooz A.; Hardin, Tommy Glenn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract A cable which may be used in buildings in riser shafts includes a core (22) which includes at least one transmission medium which is enclosed in a non-halogenated plastic material. The core is enclosed with a jacket (29) which also is made of a non-halogenated plastic material. The non-halogenated material which encloses the transmission medium is a plastic material selected from the group consisting of a filled polyolefin, a polyphenylene oxide a polyetherimide and asilicone-polyimide copolymer and blend compositions of a polyetherimide and a silicone-polyimide copolymer. For the jacket the plastic material comprises a filled polyolefin.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 11, 1990 and granted July 26, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 11, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.